Combined boring and milling machine drive



July 12, 1938. I R. (Jun IIH v pomsman sonme AND MILLING MACHINE DRIVE Filed Sept. '1, 1937 :s sneets-sheet'l z zvnz or fink/(1L 06% July 12,- 1938. R, L, OTTA 2,123,649

COMBINED BORING AND MILLING MACHINE DRIVE Filed Sept. 1, 1957 s Sheets-Sheet 2 llllllllllllllllll IIIIII mlllmnvmwmlln'nmmn mum"- I July 12, 1938; R, GOTTA .2,l23,649

COMBINED BORING AND-MILLING MACHINE DRIVE Filed Sept. 1, 1957 3 Sheets-Sheet 3 a E 9 i I 1& A,

Patented July 12, 1938 UNITED STATES COMBINED BORING. AND mums momma nmvn Ralph L. Gotta, Philadelphia, Pa; assig'llol' to 'William Sellers 8; Company,

corporation of Pennsyl- Philadelphia, Pa., a vania Incorporated,

Application September 1, 1937,"Serial No. 162,023. 8 Claims. (01.29-26) This invention relates to machine tools, and more particularly to a drive for controlling the several movements of the various operating parts of machine tools such as horizontal boring and milling machines. Such machines usually comprise a bed or work support upon. which is mounted for longitudinal movement a saddle which, in turn, bears a table mounted for transverse movement. Columns arise from opposite ends of the bed, one carrying a boring head and the other an outboard support for the boring spindle. The head and outboard support are vertically shiftable upon their respective columns and the head carries a spindle, or spindles, which must be both rotated and longitudinally shifted. Since the spindle rotation and traverse of one of the movable elements must takeplace simultaneously, separate driving transmissions must be provided to take care of these operations. The transmission governing the rotation of the spindle must be made reversible toenable use of right or lefthand cutters, taps or thelike, and the transmission controlling the spindle feed must derive its power from the spindle itself for, obviously, in tapping, thread-cutting operations and the like the rotative speed of the spindle must be .accurately correlated to the speed at which the spindie is fed. Furthermore, the spindle feed must be reversible simultaneously with the spindle in order that tools such as taps may be properly withdrawn. It will be seen that if this spindle feed transmission is used to control the feeds of the head, saddle and table each time that the spindle feed is reversed or the direction of rotation of the spindle reversed, the direction of operation of the three remaining units would be .likewise reversed, with the result that control Y direction.

An important object of this invention is the provision of a construction such that the feed transmission controlling the feed of the'spindle may likewise be employed in operation of the headftable and saddle while still enabling the use of levers the positions of which will indicate the direction of movement of the part with which they are associated.

Another object of the invention is the provision of a construction su'chthat a single pilot wheel may be utilized in feeding of any of the spindle, the head, the table or the .saddle, and when employed in feeding the head, table or saddle may be operated ineither direction to provide movement of the affected part in the direction selected by its individual control lever. I

These and other objects I attain by'the con- The head supports a driving motor l1 and mounts a spindle, or spindles, It for both rotation and 'struction shown in the accompanying drawings wherein, for the purposeof illustration, I have shown a preferred embodiment of my invention and wherein:

Fig. 1 is a side elevation ofa combined boring and milling machine, embodying a drive constructed in accordance with my invention;

Fig. 2 is a diagrammatic illustration of the transmission mechanism employed;

Fig. 3 is an enlarged sectional view through the -unidirectional drive; and I Fig. 4 is a section on line 44 of Fig. 3.

Referring now more particularly to the drawings, the numeral It generally designates a base upon which is mounted for longitudinal movement a saddle H and table l2.- Mounted at' opposite ends of the base are columns i3 and it upon which are mounted for vertical movement a boring head l5 and an outboard support It.

longitudinal movement. Contained within the head is a speed control transmission unit I9 driven from the motor through a reversing gearing disposed a reversing gear 21 controlling rotation of the screws 29 and 29 which control vertical movement of the head and outboardsupport respectively and a reversing gear 30 which, through clutches 3| and 32, controls the operation of, the I saddle feed screw 33 and the table drive shaft 34 operating the drive nut35 engaging the table feed screw 36. These elements in the main are merely conventionally indicated, since they may be of any usual and well-known construction.

Bevel gear 31 secured tothe lower end of lay shaft meshes with a pair of oppositely faced bevel gears 38, loosely mounted on a shaft 39 and each provided with an overrunning clutch 49 through which shaft 39 can be driven in one direction only. It will be obvious that si'nce'these gears 39 are oppositely driven by gear 31, shaft 39 will be, driven from the bevel gear which is running in the predetermined unidirection without regard to the direction of operation of the spindle feed from which this drive is derived. It is thus possible to utilize a Singlej;fi unit in operation of the various movable elments of the machine.

of the shaft 25 extends, and in this casingare trol levers 42, 43 and controlling respectively the saddle I I, table l2, and head l5, may be so positioned thata movement in a, given direction thereof will cause a movement of the associated part in the same direction, and this-without regard towhether or not the reversible transmission from which 'theyvderive their power is operated in one or'the other direction. The output shaft 24 of the feed unit, in addition to being movable through its motor drive, is movable through a pilot wheel 4| which may be selectively engaged therewith through the usual clutch mechanisms, not herein disclosed. Pilot wheel ll may, therefore, be employed in operation of any of the movable elements since the output shaft 24 controls, throughthe several clutches and reversing mechanisms 2.1, 3|, and 32, the operation of each of the movable elements. This feature is of considerable advantage in the type of machine illustrated in that the operator may set the control levers for movement of the selected part'in the selected direcna'med shaft an tion and, without reference to'the direction of movement of the pilot wheel all, may shift the selected part in a selected direction. If, for ex-, ample, while standing close to his work he is able to reach an arm of the pilot wheel but is unable to move that arm through a suflicient arc to enable him to grasp a further arm, he may oscillate the pilotwheel and thereby produce a continuous movement of the affected partin the constructed, I do not wish to be understood as limiting myself to .the particular arrangement therein illustrated except as hereinafter claimed.

I claim:

1. In a machine tool embodying-a vertically movable head, an axially movable spindle carried by the head,a horizontally movable saddle and a table movable transversely upon the saddle, a reversible variable speed'transmissionhaving an output shaft controlling .the axial movement of the spindle, a second shaft, an irreversible driving connection between said second shaft and the output shaft of the transmission and a reversible drivin connection between the firstfeeding means for each of said head, said-saddle-and said table.

2. In amachine tool embodying a vertically movable head, an axially movable spindle carried by the head, a horizontally movable saddle and a table movable transversely upon the saddle, a reversible variable speed transmission having an output shaft controlling the axial movement of the spindle, a shaft, an irreversible driving connection between said shaft and-the output shaft of the'transmission, a reversible driving connection between theilrst-named shaft and feeding means fc each of said head, said saddle and saidtable, and means to manually operatethe output shaft of the transmission.

3. In a machine tool embodying a vertically movable head, 'an axially movable spindle carried by the head, a reversible variable speed transmission having an output shaft controlling the axial movement ofthe spindle, a second shaft, an irreversible driving connection between said second shaft and the output shaft of the transmission and a reversible driving connection 5 between the first-named shaft and a feeding means for said head.

, 4. In a machine tool embodying a vertically movable head, an axially movable spindle carried by the head, a reversible variable speed transmission having an output shaft controlling the axial movement-of the spindle, a second shaft,

an irreversibe driving connection between said second shaft and the output shaft of the transmission, a reversible driving connection between 16 the first-named shaft and a feeding means for said head, and'means to manually operate the output shaft of the transmission.

5. In a machine tool embodying a vertically movable head, an movable spindle car- 20 spindle, a reversible connection between the output shaft of the transmission and said feeding means, a second shaft, an irreversible driving connection between said second shaft and the output shaft of the transmission and a reversible driving connection between the flrst- 80 named shaft and feeding means for each of said head, said saddle and saidtable; 6. In a machine tool embodyingya vertica movable head, an axially movable spindle carried by the head, a horizontally movable saddle.35

and a table movable transversely upon the saddle, a reversible variable speed transmission having an output shaft, a feeding means for said spindle, a reversible connection between the output shaft of the transmission and said feeding 40 means, a shaft, an irreversible driving connection between said shaft and the output shaft of the transmission, a reversible driving connection between the first-named shaft and 1 feeding means for each of said head, said saddle and said table, and means to manually operate the output shaft of the. transmission.

7. In a machine tool embodying a'vertically movable head, an axially movable spindle carried by the head, a reversible variable speed 5 transmission having an output shaft, a feeding means for said spindle, a reversible connection between the output shaft of the transmission and said feeding means, a second shaft, an irreversible driving "connection between said sec- 0nd shaft and theoutput shaft-of the transmission and a reversible driving connection between the first-named shaft and a feeding means for said head.

8. In a machine tool embodying a vertically p between the output shaft of the transmission and 5 said feeding means, a second shaft, an irreversible driving connection between said second shaft and the output shaft of the transmission, a reversible driving connection between" the firstnamed shaft anda feeding means for said head, to and means to manually operate the output shaft of the-transmission. RALPH L. CO'I'IA. 

